Execute.cpp

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include "Internal.hpp"
  41
  42 #include <dlfcn.h>
  43 #include <iconv.h>
  44
  45 #include "cycript.hpp"
  46
  47 #include "sig/parse.hpp"
  48 #include "sig/ffi_type.hpp"
  49
  50 #include "Pooling.hpp"
  51 #include "Execute.hpp"
  52
  53 #include <sys/mman.h>
  54
  55 #include <iostream>
  56 #include <ext/stdio_filebuf.h>
  57 #include <set>
  58 #include <map>
  59 #include <iomanip>
  60 #include <sstream>
  61 #include <cmath>
  62
  63 #include "Parser.hpp"
  64 #include "Cycript.tab.hh"
  65
  66 #include "Error.hpp"
  67 #include "JavaScript.hpp"
  68 #include "String.hpp"
  69
  70 struct CYHooks *hooks_;
  71
  72 /* JavaScript Properties {{{ */
  73 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, size_t index) {
  74     JSValueRef exception(NULL);
  75     JSValueRef value(JSObjectGetPropertyAtIndex(context, object, index, &exception));
  76     CYThrow(context, exception);
  77     return value;
  78 }
  79
  80 JSValueRef CYGetProperty(JSContextRef context, JSObjectRef object, JSStringRef name) {
  81     JSValueRef exception(NULL);
  82     JSValueRef value(JSObjectGetProperty(context, object, name, &exception));
  83     CYThrow(context, exception);
  84     return value;
  85 }
  86
  87 void CYSetProperty(JSContextRef context, JSObjectRef object, size_t index, JSValueRef value) {
  88     JSValueRef exception(NULL);
  89     JSObjectSetPropertyAtIndex(context, object, index, value, &exception);
  90     CYThrow(context, exception);
  91 }
  92
  93 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef value, JSPropertyAttributes attributes) {
  94     JSValueRef exception(NULL);
  95     JSObjectSetProperty(context, object, name, value, attributes, &exception);
  96     CYThrow(context, exception);
  97 }
  98
  99 void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, JSValueRef (*callback)(JSContextRef, JSObjectRef, JSObjectRef, size_t, const JSValueRef[], JSValueRef *), JSPropertyAttributes attributes) {
 100     CYSetProperty(context, object, name, JSObjectMakeFunctionWithCallback(context, name, callback), attributes);
 101 }
 102 /* }}} */
 103 /* JavaScript Strings {{{ */
 104 JSStringRef CYCopyJSString(const char *value) {
 105     return value == NULL ? NULL : JSStringCreateWithUTF8CString(value);
 106 }
 107
 108 JSStringRef CYCopyJSString(JSStringRef value) {
 109     return value == NULL ? NULL : JSStringRetain(value);
 110 }
 111
 112 JSStringRef CYCopyJSString(CYUTF8String value) {
 113     // XXX: this is very wrong; it needs to convert to UTF16 and then create from there
 114     return CYCopyJSString(value.data);
 115 }
 116
 117 JSStringRef CYCopyJSString(JSContextRef context, JSValueRef value) {
 118     if (JSValueIsNull(context, value))
 119         return NULL;
 120     JSValueRef exception(NULL);
 121     JSStringRef string(JSValueToStringCopy(context, value, &exception));
 122     CYThrow(context, exception);
 123     return string;
 124 }
 125
 126 static CYUTF16String CYCastUTF16String(JSStringRef value) {
 127     return CYUTF16String(JSStringGetCharactersPtr(value), JSStringGetLength(value));
 128 }
 129
 130 CYUTF8String CYPoolUTF8String(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 131     return CYPoolUTF8String(pool, CYCastUTF16String(value));
 132 }
 133
 134 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 135     CYUTF8String utf8(CYPoolUTF8String(pool, context, value));
 136     _assert(memchr(utf8.data, '\0', utf8.size) == NULL);
 137     return utf8.data;
 138 }
 139
 140 const char *CYPoolCString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 141     return JSValueIsNull(context, value) ? NULL : CYPoolCString(pool, context, CYJSString(context, value));
 142 }
 143 /* }}} */
 144 /* Index Offsets {{{ */
 145 size_t CYGetIndex(apr_pool_t *pool, JSContextRef context, JSStringRef value) {
 146     return CYGetIndex(CYPoolUTF8String(pool, context, value));
 147 }
 148 /* }}} */
 149
 150 static JSClassRef All_;
 151 static JSClassRef Context_;
 152 static JSClassRef Functor_;
 153 static JSClassRef Global_;
 154 static JSClassRef Pointer_;
 155 static JSClassRef Struct_;
 156
 157 JSStringRef Array_s;
 158 JSStringRef cy_s;
 159 JSStringRef length_s;
 160 JSStringRef message_s;
 161 JSStringRef name_s;
 162 JSStringRef pop_s;
 163 JSStringRef prototype_s;
 164 JSStringRef push_s;
 165 JSStringRef splice_s;
 166 JSStringRef toCYON_s;
 167 JSStringRef toJSON_s;
 168 JSStringRef toPointer_s;
 169
 170 static JSStringRef Result_;
 171
 172 void CYFinalize(JSObjectRef object) {
 173     CYData *internal(reinterpret_cast<CYData *>(JSObjectGetPrivate(object)));
 174     if (--internal->count_ == 0)
 175         delete internal;
 176 }
 177
 178 void Structor_(apr_pool_t *pool, sig::Type *&type) {
 179     if (
 180         type->primitive == sig::pointer_P &&
 181         type->data.data.type != NULL &&
 182         type->data.data.type->primitive == sig::struct_P &&
 183         type->data.data.type->name != NULL &&
 184         strcmp(type->data.data.type->name, "_objc_class") == 0
 185     ) {
 186         type->primitive = sig::typename_P;
 187         type->data.data.type = NULL;
 188         return;
 189     }
 190
 191     if (type->primitive != sig::struct_P || type->name == NULL)
 192         return;
 193
 194     size_t length(strlen(type->name));
 195     char keyed[length + 2];
 196     memcpy(keyed + 1, type->name, length + 1);
 197
 198     static const char *modes = "34";
 199     for (size_t i(0); i != 2; ++i) {
 200         char mode(modes[i]);
 201         keyed[0] = mode;
 202
 203         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 204             switch (mode) {
 205                 case '3':
 206                     sig::Parse(pool, &type->data.signature, entry->value_, &Structor_);
 207                 break;
 208
 209                 case '4': {
 210                     sig::Signature signature;
 211                     sig::Parse(pool, &signature, entry->value_, &Structor_);
 212                     type = signature.elements[0].type;
 213                 } break;
 214             }
 215     }
 216 }
 217
 218 JSClassRef Type_privateData::Class_;
 219
 220 struct Context :
 221     CYData
 222 {
 223     JSGlobalContextRef context_;
 224
 225     Context(JSGlobalContextRef context) :
 226         context_(context)
 227     {
 228     }
 229 };
 230
 231 struct Pointer :
 232     CYOwned
 233 {
 234     Type_privateData *type_;
 235     size_t length_;
 236
 237     Pointer(void *value, JSContextRef context, JSObjectRef owner, size_t length, sig::Type *type) :
 238         CYOwned(value, context, owner),
 239         type_(new(pool_) Type_privateData(type)),
 240         length_(length)
 241     {
 242     }
 243 };
 244
 245 struct Struct_privateData :
 246     CYOwned
 247 {
 248     Type_privateData *type_;
 249
 250     Struct_privateData(JSContextRef context, JSObjectRef owner) :
 251         CYOwned(NULL, context, owner)
 252     {
 253     }
 254 };
 255
 256 typedef std::map<const char *, Type_privateData *, CYCStringLess> TypeMap;
 257 static TypeMap Types_;
 258
 259 JSObjectRef CYMakeStruct(JSContextRef context, void *data, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 260     Struct_privateData *internal(new Struct_privateData(context, owner));
 261     apr_pool_t *pool(internal->pool_);
 262     Type_privateData *typical(new(pool) Type_privateData(type, ffi));
 263     internal->type_ = typical;
 264
 265     if (owner != NULL)
 266         internal->value_ = data;
 267     else {
 268         size_t size(typical->GetFFI()->size);
 269         void *copy(apr_palloc(internal->pool_, size));
 270         memcpy(copy, data, size);
 271         internal->value_ = copy;
 272     }
 273
 274     return JSObjectMake(context, Struct_, internal);
 275 }
 276
 277 JSValueRef CYCastJSValue(JSContextRef context, bool value) {
 278     return JSValueMakeBoolean(context, value);
 279 }
 280
 281 JSValueRef CYCastJSValue(JSContextRef context, double value) {
 282     return JSValueMakeNumber(context, value);
 283 }
 284
 285 #define CYCastJSValue_(Type_) \
 286     JSValueRef CYCastJSValue(JSContextRef context, Type_ value) { \
 287         return JSValueMakeNumber(context, static_cast<double>(value)); \
 288     }
 289
 290 CYCastJSValue_(int)
 291 CYCastJSValue_(unsigned int)
 292 CYCastJSValue_(long int)
 293 CYCastJSValue_(long unsigned int)
 294 CYCastJSValue_(long long int)
 295 CYCastJSValue_(long long unsigned int)
 296
 297 JSValueRef CYJSUndefined(JSContextRef context) {
 298     return JSValueMakeUndefined(context);
 299 }
 300
 301 double CYCastDouble(JSContextRef context, JSValueRef value) {
 302     JSValueRef exception(NULL);
 303     double number(JSValueToNumber(context, value, &exception));
 304     CYThrow(context, exception);
 305     return number;
 306 }
 307
 308 bool CYCastBool(JSContextRef context, JSValueRef value) {
 309     return JSValueToBoolean(context, value);
 310 }
 311
 312 JSValueRef CYJSNull(JSContextRef context) {
 313     return JSValueMakeNull(context);
 314 }
 315
 316 JSValueRef CYCastJSValue(JSContextRef context, JSStringRef value) {
 317     return value == NULL ? CYJSNull(context) : JSValueMakeString(context, value);
 318 }
 319
 320 JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
 321     return CYCastJSValue(context, CYJSString(value));
 322 }
 323
 324 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
 325     JSValueRef exception(NULL);
 326     JSObjectRef object(JSValueToObject(context, value, &exception));
 327     CYThrow(context, exception);
 328     return object;
 329 }
 330
 331 JSValueRef CYCallAsFunction(JSContextRef context, JSObjectRef function, JSObjectRef _this, size_t count, const JSValueRef arguments[]) {
 332     JSValueRef exception(NULL);
 333     JSValueRef value(JSObjectCallAsFunction(context, function, _this, count, arguments, &exception));
 334     CYThrow(context, exception);
 335     return value;
 336 }
 337
 338 bool CYIsCallable(JSContextRef context, JSValueRef value) {
 339     return value != NULL && JSValueIsObject(context, value) && JSObjectIsFunction(context, (JSObjectRef) value);
 340 }
 341
 342 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 343     if (count == 0)
 344         printf("\n");
 345     else {
 346         CYPool pool;
 347         printf("%s\n", CYPoolCString(pool, context, arguments[0]));
 348     }
 349
 350     return CYJSUndefined(context);
 351 } CYCatch }
 352
 353 static size_t Nonce_(0);
 354
 355 static JSValueRef $cyq(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 356     CYPool pool;
 357     const char *name(apr_psprintf(pool, "%s%"APR_SIZE_T_FMT"", CYPoolCString(pool, context, arguments[0]), Nonce_++));
 358     return CYCastJSValue(context, name);
 359 }
 360
 361 static JSValueRef Cycript_gc_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 362     JSGarbageCollect(context);
 363     return CYJSUndefined(context);
 364 }
 365
 366 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) { CYTry {
 367     switch (JSType type = JSValueGetType(context, value)) {
 368         case kJSTypeUndefined:
 369             return "undefined";
 370         case kJSTypeNull:
 371             return "null";
 372         case kJSTypeBoolean:
 373             return CYCastBool(context, value) ? "true" : "false";
 374
 375         case kJSTypeNumber: {
 376             std::ostringstream str;
 377             CYNumerify(str, CYCastDouble(context, value));
 378             std::string value(str.str());
 379             return apr_pstrmemdup(pool, value.c_str(), value.size());
 380         } break;
 381
 382         case kJSTypeString: {
 383             std::ostringstream str;
 384             CYUTF8String string(CYPoolUTF8String(pool, context, CYJSString(context, value)));
 385             CYStringify(str, string.data, string.size);
 386             std::string value(str.str());
 387             return apr_pstrmemdup(pool, value.c_str(), value.size());
 388         } break;
 389
 390         case kJSTypeObject:
 391             return CYPoolCCYON(pool, context, (JSObjectRef) value);
 392         default:
 393             throw CYJSError(context, "JSValueGetType() == 0x%x", type);
 394     }
 395 } CYCatch }
 396
 397 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
 398     JSValueRef exception(NULL);
 399     const char *cyon(CYPoolCCYON(pool, context, value, &exception));
 400     CYThrow(context, exception);
 401     return cyon;
 402 }
 403
 404 const char *CYPoolCCYON(apr_pool_t *pool, JSContextRef context, JSObjectRef object) {
 405     JSValueRef toCYON(CYGetProperty(context, object, toCYON_s));
 406     if (CYIsCallable(context, toCYON)) {
 407         JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toCYON, object, 0, NULL));
 408         _assert(value != NULL);
 409         return CYPoolCString(pool, context, value);
 410     }
 411
 412     JSValueRef toJSON(CYGetProperty(context, object, toJSON_s));
 413     if (CYIsCallable(context, toJSON)) {
 414         JSValueRef arguments[1] = {CYCastJSValue(context, CYJSString(""))};
 415         JSValueRef exception(NULL);
 416         const char *cyon(CYPoolCCYON(pool, context, CYCallAsFunction(context, (JSObjectRef) toJSON, object, 1, arguments), &exception));
 417         CYThrow(context, exception);
 418         return cyon;
 419     }
 420
 421     std::ostringstream str;
 422
 423     str << '{';
 424
 425     // XXX: this is, sadly, going to leak
 426     JSPropertyNameArrayRef names(JSObjectCopyPropertyNames(context, object));
 427
 428     bool comma(false);
 429
 430     for (size_t index(0), count(JSPropertyNameArrayGetCount(names)); index != count; ++index) {
 431         JSStringRef name(JSPropertyNameArrayGetNameAtIndex(names, index));
 432         JSValueRef value(CYGetProperty(context, object, name));
 433
 434         if (comma)
 435             str << ',';
 436         else
 437             comma = true;
 438
 439         CYUTF8String string(CYPoolUTF8String(pool, context, name));
 440         if (CYIsKey(string))
 441             str << string.data;
 442         else
 443             CYStringify(str, string.data, string.size);
 444
 445         str << ':' << CYPoolCCYON(pool, context, value);
 446     }
 447
 448     str << '}';
 449
 450     JSPropertyNameArrayRelease(names);
 451
 452     std::string string(str.str());
 453     return apr_pstrmemdup(pool, string.c_str(), string.size());
 454 }
 455
 456 static JSValueRef Array_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
 457     CYPool pool;
 458     std::ostringstream str;
 459
 460     str << '[';
 461
 462     JSValueRef length(CYGetProperty(context, _this, length_s));
 463     bool comma(false);
 464
 465     for (size_t index(0), count(CYCastDouble(context, length)); index != count; ++index) {
 466         JSValueRef value(CYGetProperty(context, _this, index));
 467
 468         if (comma)
 469             str << ',';
 470         else
 471             comma = true;
 472
 473         if (!JSValueIsUndefined(context, value))
 474             str << CYPoolCCYON(pool, context, value);
 475         else {
 476             str << ',';
 477             comma = false;
 478         }
 479     }
 480
 481     str << ']';
 482
 483     std::string value(str.str());
 484     return CYCastJSValue(context, CYJSString(CYUTF8String(value.c_str(), value.size())));
 485 } CYCatch }
 486
 487 JSObjectRef CYMakePointer(JSContextRef context, void *pointer, size_t length, sig::Type *type, ffi_type *ffi, JSObjectRef owner) {
 488     Pointer *internal(new Pointer(pointer, context, owner, length, type));
 489     return JSObjectMake(context, Pointer_, internal);
 490 }
 491
 492 static JSObjectRef CYMakeFunctor(JSContextRef context, void (*function)(), const char *type, void **cache = NULL) {
 493     cy::Functor *internal;
 494
 495     if (cache != NULL && *cache != NULL) {
 496         internal = reinterpret_cast<cy::Functor *>(*cache);
 497         ++internal->count_;
 498     } else {
 499         internal = new cy::Functor(type, function);
 500
 501         if (cache != NULL) {
 502             *cache = internal;
 503             ++internal->count_;
 504         }
 505     }
 506
 507     return JSObjectMake(context, Functor_, internal);
 508 }
 509
 510 static bool CYGetOffset(apr_pool_t *pool, JSContextRef context, JSStringRef value, ssize_t &index) {
 511     return CYGetOffset(CYPoolCString(pool, context, value), index);
 512 }
 513
 514 void *CYCastPointer_(JSContextRef context, JSValueRef value) {
 515     switch (JSValueGetType(context, value)) {
 516         case kJSTypeNull:
 517             return NULL;
 518         case kJSTypeObject: {
 519             JSObjectRef object((JSObjectRef) value);
 520             if (JSValueIsObjectOfClass(context, value, Pointer_)) {
 521                 Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 522                 return internal->value_;
 523             }
 524             JSValueRef toPointer(CYGetProperty(context, object, toPointer_s));
 525             if (CYIsCallable(context, toPointer)) {
 526                 JSValueRef value(CYCallAsFunction(context, (JSObjectRef) toPointer, object, 0, NULL));
 527                 _assert(value != NULL);
 528                 return CYCastPointer_(context, value);
 529             }
 530         } default:
 531             double number(CYCastDouble(context, value));
 532             if (std::isnan(number))
 533                 throw CYJSError(context, "cannot convert value to pointer");
 534             return reinterpret_cast<void *>(static_cast<uintptr_t>(static_cast<long long>(number)));
 535     }
 536 }
 537
 538 void CYPoolFFI(apr_pool_t *pool, JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, JSValueRef value) {
 539     switch (type->primitive) {
 540         case sig::boolean_P:
 541             *reinterpret_cast<bool *>(data) = JSValueToBoolean(context, value);
 542         break;
 543
 544 #define CYPoolFFI_(primitive, native) \
 545         case sig::primitive ## _P: \
 546             *reinterpret_cast<native *>(data) = CYCastDouble(context, value); \
 547         break;
 548
 549         CYPoolFFI_(uchar, unsigned char)
 550         CYPoolFFI_(char, char)
 551         CYPoolFFI_(ushort, unsigned short)
 552         CYPoolFFI_(short, short)
 553         CYPoolFFI_(ulong, unsigned long)
 554         CYPoolFFI_(long, long)
 555         CYPoolFFI_(uint, unsigned int)
 556         CYPoolFFI_(int, int)
 557         CYPoolFFI_(ulonglong, unsigned long long)
 558         CYPoolFFI_(longlong, long long)
 559         CYPoolFFI_(float, float)
 560         CYPoolFFI_(double, double)
 561
 562         case sig::array_P: {
 563             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 564             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 565             for (size_t index(0); index != type->data.data.size; ++index) {
 566                 ffi_type *field(ffi->elements[index]);
 567
 568                 JSValueRef rhs;
 569                 if (aggregate == NULL)
 570                     rhs = value;
 571                 else {
 572                     rhs = CYGetProperty(context, aggregate, index);
 573                     if (JSValueIsUndefined(context, rhs))
 574                         throw CYJSError(context, "unable to extract array value");
 575                 }
 576
 577                 CYPoolFFI(pool, context, type->data.data.type, field, base, rhs);
 578                 // XXX: alignment?
 579                 base += field->size;
 580             }
 581         } break;
 582
 583         case sig::pointer_P:
 584             *reinterpret_cast<void **>(data) = CYCastPointer<void *>(context, value);
 585         break;
 586
 587         case sig::string_P:
 588             *reinterpret_cast<const char **>(data) = CYPoolCString(pool, context, value);
 589         break;
 590
 591         case sig::struct_P: {
 592             uint8_t *base(reinterpret_cast<uint8_t *>(data));
 593             JSObjectRef aggregate(JSValueIsObject(context, value) ? (JSObjectRef) value : NULL);
 594             for (size_t index(0); index != type->data.signature.count; ++index) {
 595                 sig::Element *element(&type->data.signature.elements[index]);
 596                 ffi_type *field(ffi->elements[index]);
 597
 598                 JSValueRef rhs;
 599                 if (aggregate == NULL)
 600                     rhs = value;
 601                 else {
 602                     rhs = CYGetProperty(context, aggregate, index);
 603                     if (JSValueIsUndefined(context, rhs)) {
 604                         if (element->name != NULL)
 605                             rhs = CYGetProperty(context, aggregate, CYJSString(element->name));
 606                         else
 607                             goto undefined;
 608                         if (JSValueIsUndefined(context, rhs)) undefined:
 609                             throw CYJSError(context, "unable to extract structure value");
 610                     }
 611                 }
 612
 613                 CYPoolFFI(pool, context, element->type, field, base, rhs);
 614                 // XXX: alignment?
 615                 base += field->size;
 616             }
 617         } break;
 618
 619         case sig::void_P:
 620         break;
 621
 622         default:
 623             if (hooks_ != NULL && hooks_->PoolFFI != NULL)
 624                 if ((*hooks_->PoolFFI)(pool, context, type, ffi, data, value))
 625                     return;
 626
 627             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 628     }
 629 }
 630
 631 JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, ffi_type *ffi, void *data, bool initialize, JSObjectRef owner) {
 632     switch (type->primitive) {
 633         case sig::boolean_P:
 634             return CYCastJSValue(context, *reinterpret_cast<bool *>(data));
 635
 636 #define CYFromFFI_(primitive, native) \
 637         case sig::primitive ## _P: \
 638             return CYCastJSValue(context, *reinterpret_cast<native *>(data)); \
 639
 640         CYFromFFI_(uchar, unsigned char)
 641         CYFromFFI_(char, char)
 642         CYFromFFI_(ushort, unsigned short)
 643         CYFromFFI_(short, short)
 644         CYFromFFI_(ulong, unsigned long)
 645         CYFromFFI_(long, long)
 646         CYFromFFI_(uint, unsigned int)
 647         CYFromFFI_(int, int)
 648         CYFromFFI_(ulonglong, unsigned long long)
 649         CYFromFFI_(longlong, long long)
 650         CYFromFFI_(float, float)
 651         CYFromFFI_(double, double)
 652
 653         case sig::array_P:
 654             if (void *pointer = data)
 655                 return CYMakePointer(context, pointer, type->data.data.size, type->data.data.type, NULL, owner);
 656             else goto null;
 657
 658         case sig::pointer_P:
 659             if (void *pointer = *reinterpret_cast<void **>(data))
 660                 return CYMakePointer(context, pointer, _not(size_t), type->data.data.type, NULL, owner);
 661             else goto null;
 662
 663         case sig::string_P:
 664             if (char *utf8 = *reinterpret_cast<char **>(data))
 665                 return CYCastJSValue(context, utf8);
 666             else goto null;
 667
 668         case sig::struct_P:
 669             return CYMakeStruct(context, data, type, ffi, owner);
 670         case sig::void_P:
 671             return CYJSUndefined(context);
 672
 673         null:
 674             return CYJSNull(context);
 675         default:
 676             if (hooks_ != NULL && hooks_->FromFFI != NULL)
 677                 if (JSValueRef value = (*hooks_->FromFFI)(context, type, ffi, data, initialize, owner))
 678                     return value;
 679
 680             CYThrow("unimplemented signature code: '%c''\n", type->primitive);
 681     }
 682 }
 683
 684 static void FunctionClosure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
 685     Closure_privateData *internal(reinterpret_cast<Closure_privateData *>(arg));
 686
 687     JSContextRef context(internal->context_);
 688
 689     size_t count(internal->cif_.nargs);
 690     JSValueRef values[count];
 691
 692     for (size_t index(0); index != count; ++index)
 693         values[index] = CYFromFFI(context, internal->signature_.elements[1 + index].type, internal->cif_.arg_types[index], arguments[index]);
 694
 695     JSValueRef value(CYCallAsFunction(context, internal->function_, NULL, count, values));
 696     CYPoolFFI(NULL, context, internal->signature_.elements[0].type, internal->cif_.rtype, result, value);
 697 }
 698
 699 Closure_privateData *CYMakeFunctor_(JSContextRef context, JSObjectRef function, const char *type, void (*callback)(ffi_cif *, void *, void **, void *)) {
 700     // XXX: in case of exceptions this will leak
 701     // XXX: in point of fact, this may /need/ to leak :(
 702     Closure_privateData *internal(new Closure_privateData(context, function, type));
 703
 704     ffi_closure *closure((ffi_closure *) _syscall(mmap(
 705         NULL, sizeof(ffi_closure),
 706         PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
 707         -1, 0
 708     )));
 709
 710     ffi_status status(ffi_prep_closure(closure, &internal->cif_, callback, internal));
 711     _assert(status == FFI_OK);
 712
 713     _syscall(mprotect(closure, sizeof(*closure), PROT_READ | PROT_EXEC));
 714
 715     internal->value_ = closure;
 716
 717     return internal;
 718 }
 719
 720 static JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char *type) {
 721     Closure_privateData *internal(CYMakeFunctor_(context, function, type, &FunctionClosure_));
 722     JSObjectRef object(JSObjectMake(context, Functor_, internal));
 723     // XXX: see above notes about needing to leak
 724     JSValueProtect(CYGetJSContext(context), object);
 725     return object;
 726 }
 727
 728 JSObjectRef CYGetCachedObject(JSContextRef context, JSStringRef name) {
 729     return CYCastJSObject(context, CYGetProperty(context, CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s)), name));
 730 }
 731
 732 static JSObjectRef CYMakeFunctor(JSContextRef context, JSValueRef value, const char *type) {
 733     JSObjectRef Function(CYGetCachedObject(context, CYJSString("Function")));
 734
 735     JSValueRef exception(NULL);
 736     bool function(JSValueIsInstanceOfConstructor(context, value, Function, &exception));
 737     CYThrow(context, exception);
 738
 739     if (function) {
 740         JSObjectRef function(CYCastJSObject(context, value));
 741         return CYMakeFunctor(context, function, type);
 742     } else {
 743         void (*function)()(CYCastPointer<void (*)()>(context, value));
 744         return CYMakeFunctor(context, function, type);
 745     }
 746 }
 747
 748 static bool Index_(apr_pool_t *pool, JSContextRef context, Struct_privateData *internal, JSStringRef property, ssize_t &index, uint8_t *&base) {
 749     Type_privateData *typical(internal->type_);
 750     sig::Type *type(typical->type_);
 751     if (type == NULL)
 752         return false;
 753
 754     const char *name(CYPoolCString(pool, context, property));
 755     size_t length(strlen(name));
 756     double number(CYCastDouble(name, length));
 757
 758     size_t count(type->data.signature.count);
 759
 760     if (std::isnan(number)) {
 761         if (property == NULL)
 762             return false;
 763
 764         sig::Element *elements(type->data.signature.elements);
 765
 766         for (size_t local(0); local != count; ++local) {
 767             sig::Element *element(&elements[local]);
 768             if (element->name != NULL && strcmp(name, element->name) == 0) {
 769                 index = local;
 770                 goto base;
 771             }
 772         }
 773
 774         return false;
 775     } else {
 776         index = static_cast<ssize_t>(number);
 777         if (index != number || index < 0 || static_cast<size_t>(index) >= count)
 778             return false;
 779     }
 780
 781   base:
 782     ffi_type **elements(typical->GetFFI()->elements);
 783
 784     base = reinterpret_cast<uint8_t *>(internal->value_);
 785     for (ssize_t local(0); local != index; ++local)
 786         base += elements[local]->size;
 787
 788     return true;
 789 }
 790
 791 static JSValueRef Pointer_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 792     CYPool pool;
 793     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 794
 795     if (JSStringIsEqual(property, length_s))
 796         return internal->length_ == _not(size_t) ? CYJSUndefined(context) : CYCastJSValue(context, internal->length_);
 797
 798     Type_privateData *typical(internal->type_);
 799
 800     if (typical->type_ == NULL)
 801         return NULL;
 802
 803     ssize_t offset;
 804     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 805         offset = 0;
 806     else if (!CYGetOffset(pool, context, property, offset))
 807         return NULL;
 808
 809     ffi_type *ffi(typical->GetFFI());
 810
 811     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 812     base += ffi->size * offset;
 813
 814     JSObjectRef owner(internal->GetOwner() ?: object);
 815     return CYFromFFI(context, typical->type_, ffi, base, false, owner);
 816 } CYCatch }
 817
 818 static bool Pointer_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 819     CYPool pool;
 820     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(object)));
 821     Type_privateData *typical(internal->type_);
 822
 823     if (typical->type_ == NULL)
 824         return NULL;
 825
 826     ssize_t offset;
 827     if (JSStringIsEqualToUTF8CString(property, "$cyi"))
 828         offset = 0;
 829     else if (!CYGetOffset(pool, context, property, offset))
 830         return NULL;
 831
 832     ffi_type *ffi(typical->GetFFI());
 833
 834     uint8_t *base(reinterpret_cast<uint8_t *>(internal->value_));
 835     base += ffi->size * offset;
 836
 837     CYPoolFFI(NULL, context, typical->type_, ffi, base, value);
 838     return true;
 839 } CYCatch }
 840
 841 static JSValueRef Struct_callAsFunction_$cya(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 842     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(_this)));
 843     Type_privateData *typical(internal->type_);
 844     return CYMakePointer(context, internal->value_, _not(size_t), typical->type_, typical->ffi_, _this);
 845 }
 846
 847 static JSValueRef Struct_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 848     CYPool pool;
 849     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 850     Type_privateData *typical(internal->type_);
 851
 852     ssize_t index;
 853     uint8_t *base;
 854
 855     if (!Index_(pool, context, internal, property, index, base))
 856         return NULL;
 857
 858     JSObjectRef owner(internal->GetOwner() ?: object);
 859
 860     return CYFromFFI(context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, false, owner);
 861 } CYCatch }
 862
 863 static bool Struct_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) { CYTry {
 864     CYPool pool;
 865     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 866     Type_privateData *typical(internal->type_);
 867
 868     ssize_t index;
 869     uint8_t *base;
 870
 871     if (!Index_(pool, context, internal, property, index, base))
 872         return false;
 873
 874     CYPoolFFI(NULL, context, typical->type_->data.signature.elements[index].type, typical->GetFFI()->elements[index], base, value);
 875     return true;
 876 } CYCatch }
 877
 878 static void Struct_getPropertyNames(JSContextRef context, JSObjectRef object, JSPropertyNameAccumulatorRef names) {
 879     Struct_privateData *internal(reinterpret_cast<Struct_privateData *>(JSObjectGetPrivate(object)));
 880     Type_privateData *typical(internal->type_);
 881     sig::Type *type(typical->type_);
 882
 883     if (type == NULL)
 884         return;
 885
 886     size_t count(type->data.signature.count);
 887     sig::Element *elements(type->data.signature.elements);
 888
 889     char number[32];
 890
 891     for (size_t index(0); index != count; ++index) {
 892         const char *name;
 893         name = elements[index].name;
 894
 895         if (name == NULL) {
 896             sprintf(number, "%zu", index);
 897             name = number;
 898         }
 899
 900         JSPropertyNameAccumulatorAddName(names, CYJSString(name));
 901     }
 902 }
 903
 904 JSValueRef CYCallFunction(apr_pool_t *pool, JSContextRef context, size_t setups, void *setup[], size_t count, const JSValueRef arguments[], bool initialize, JSValueRef *exception, sig::Signature *signature, ffi_cif *cif, void (*function)()) { CYTry {
 905     if (setups + count != signature->count - 1)
 906         throw CYJSError(context, "incorrect number of arguments to ffi function");
 907
 908     size_t size(setups + count);
 909     void *values[size];
 910     memcpy(values, setup, sizeof(void *) * setups);
 911
 912     for (size_t index(setups); index != size; ++index) {
 913         sig::Element *element(&signature->elements[index + 1]);
 914         ffi_type *ffi(cif->arg_types[index]);
 915         // XXX: alignment?
 916         values[index] = new(pool) uint8_t[ffi->size];
 917         CYPoolFFI(pool, context, element->type, ffi, values[index], arguments[index - setups]);
 918     }
 919
 920     uint8_t value[cif->rtype->size];
 921
 922     if (hooks_ != NULL && hooks_->CallFunction != NULL)
 923         (*hooks_->CallFunction)(context, cif, function, value, values);
 924     else
 925         ffi_call(cif, function, value, values);
 926
 927     return CYFromFFI(context, signature->elements[0].type, cif->rtype, value, initialize);
 928 } CYCatch }
 929
 930 static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
 931     CYPool pool;
 932     cy::Functor *internal(reinterpret_cast<cy::Functor *>(JSObjectGetPrivate(object)));
 933     return CYCallFunction(pool, context, 0, NULL, count, arguments, false, exception, &internal->signature_, &internal->cif_, internal->GetValue());
 934 }
 935
 936 static JSObjectRef CYMakeType(JSContextRef context, const char *type) {
 937     Type_privateData *internal(new Type_privateData(type));
 938     return JSObjectMake(context, Type_privateData::Class_, internal);
 939 }
 940
 941 static JSObjectRef CYMakeType(JSContextRef context, sig::Type *type) {
 942     Type_privateData *internal(new Type_privateData(type));
 943     return JSObjectMake(context, Type_privateData::Class_, internal);
 944 }
 945
 946 static void *CYCastSymbol(const char *name) {
 947     return dlsym(RTLD_DEFAULT, name);
 948 }
 949
 950 static JSValueRef All_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
 951     JSObjectRef global(CYGetGlobalObject(context));
 952     JSObjectRef cycript(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Cycript"))));
 953     if (JSValueRef value = CYGetProperty(context, cycript, property))
 954         if (!JSValueIsUndefined(context, value))
 955             return value;
 956
 957     CYPool pool;
 958     CYUTF8String name(CYPoolUTF8String(pool, context, property));
 959
 960     if (hooks_ != NULL && hooks_->RuntimeProperty != NULL)
 961         if (JSValueRef value = (*hooks_->RuntimeProperty)(context, name))
 962             return value;
 963
 964     size_t length(name.size);
 965     char keyed[length + 2];
 966     memcpy(keyed + 1, name.data, length + 1);
 967
 968     static const char *modes = "0124";
 969     for (size_t i(0); i != 4; ++i) {
 970         char mode(modes[i]);
 971         keyed[0] = mode;
 972
 973         if (CYBridgeEntry *entry = CYBridgeHash(keyed, length + 1))
 974             switch (mode) {
 975                 case '0':
 976                     return JSEvaluateScript(CYGetJSContext(context), CYJSString(entry->value_), NULL, NULL, 0, NULL);
 977
 978                 case '1':
 979                     if (void (*symbol)() = reinterpret_cast<void (*)()>(CYCastSymbol(name.data)))
 980                         return CYMakeFunctor(context, symbol, entry->value_, &entry->cache_);
 981                     else return NULL;
 982
 983                 case '2':
 984                     if (void *symbol = CYCastSymbol(name.data)) {
 985                         // XXX: this is horrendously inefficient
 986                         sig::Signature signature;
 987                         sig::Parse(pool, &signature, entry->value_, &Structor_);
 988                         ffi_cif cif;
 989                         sig::sig_ffi_cif(pool, &sig::ObjectiveC, &signature, &cif);
 990                         return CYFromFFI(context, signature.elements[0].type, cif.rtype, symbol);
 991                     } else return NULL;
 992
 993                 // XXX: implement case 3
 994                 case '4':
 995                     return CYMakeType(context, entry->value_);
 996             }
 997     }
 998
 999     return NULL;
1000 } CYCatch }
1001
1002 static JSObjectRef Pointer_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1003     if (count != 2)
1004         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1005
1006     CYPool pool;
1007
1008     void *value(CYCastPointer<void *>(context, arguments[0]));
1009     const char *type(CYPoolCString(pool, context, arguments[1]));
1010
1011     sig::Signature signature;
1012     sig::Parse(pool, &signature, type, &Structor_);
1013
1014     return CYMakePointer(context, value, _not(size_t), signature.elements[0].type, NULL, NULL);
1015 } CYCatch }
1016
1017 static JSObjectRef Type_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1018     if (count != 1)
1019         throw CYJSError(context, "incorrect number of arguments to Type constructor");
1020     CYPool pool;
1021     const char *type(CYPoolCString(pool, context, arguments[0]));
1022     return CYMakeType(context, type);
1023 } CYCatch }
1024
1025 static JSValueRef Type_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) { CYTry {
1026     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1027
1028     sig::Type type;
1029
1030     if (JSStringIsEqualToUTF8CString(property, "$cyi")) {
1031         type.primitive = sig::pointer_P;
1032         type.data.data.size = 0;
1033     } else {
1034         CYPool pool;
1035         size_t index(CYGetIndex(pool, context, property));
1036         if (index == _not(size_t))
1037             return NULL;
1038         type.primitive = sig::array_P;
1039         type.data.data.size = index;
1040     }
1041
1042     type.name = NULL;
1043     type.flags = 0;
1044
1045     type.data.data.type = internal->type_;
1046
1047     return CYMakeType(context, &type);
1048 } CYCatch }
1049
1050 static JSValueRef Type_callAsFunction(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1051     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1052
1053     if (count != 1)
1054         throw CYJSError(context, "incorrect number of arguments to type cast function");
1055     sig::Type *type(internal->type_);
1056     ffi_type *ffi(internal->GetFFI());
1057     // XXX: alignment?
1058     uint8_t value[ffi->size];
1059     CYPool pool;
1060     CYPoolFFI(pool, context, type, ffi, value, arguments[0]);
1061     return CYFromFFI(context, type, ffi, value);
1062 } CYCatch }
1063
1064 static JSObjectRef Type_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1065     if (count != 0)
1066         throw CYJSError(context, "incorrect number of arguments to type cast function");
1067     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(object)));
1068
1069     sig::Type *type(internal->type_);
1070     size_t length;
1071
1072     if (type->primitive != sig::array_P)
1073         length = _not(size_t);
1074     else {
1075         length = type->data.data.size;
1076         type = type->data.data.type;
1077     }
1078
1079     void *value(malloc(internal->GetFFI()->size));
1080     return CYMakePointer(context, value, length, type, NULL, NULL);
1081 } CYCatch }
1082
1083 static JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1084     if (count != 2)
1085         throw CYJSError(context, "incorrect number of arguments to Functor constructor");
1086     CYPool pool;
1087     const char *type(CYPoolCString(pool, context, arguments[1]));
1088     return CYMakeFunctor(context, arguments[0], type);
1089 } CYCatch }
1090
1091 static JSValueRef CYValue_callAsFunction_valueOf(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1092     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1093     return CYCastJSValue(context, reinterpret_cast<uintptr_t>(internal->value_));
1094 } CYCatch }
1095
1096 static JSValueRef CYValue_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1097     return CYValue_callAsFunction_valueOf(context, object, _this, count, arguments, exception);
1098 }
1099
1100 static JSValueRef CYValue_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1101     CYValue *internal(reinterpret_cast<CYValue *>(JSObjectGetPrivate(_this)));
1102     char string[32];
1103     sprintf(string, "%p", internal->value_);
1104     return CYCastJSValue(context, string);
1105 } CYCatch }
1106
1107 static JSValueRef Pointer_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1108     Pointer *internal(reinterpret_cast<Pointer *>(JSObjectGetPrivate(_this)));
1109     if (internal->length_ != _not(size_t)) {
1110         JSObjectRef Array(CYGetCachedObject(context, Array_s));
1111         JSObjectRef toCYON(CYCastJSObject(context, CYGetProperty(context, Array, toCYON_s)));
1112         return CYCallAsFunction(context, toCYON, _this, count, arguments);
1113     } else {
1114         char string[32];
1115         sprintf(string, "%p", internal->value_);
1116         return CYCastJSValue(context, string);
1117     }
1118 } CYCatch }
1119
1120 static JSValueRef Type_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1121     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1122     CYPool pool;
1123     const char *type(sig::Unparse(pool, internal->type_));
1124     return CYCastJSValue(context, CYJSString(type));
1125 } CYCatch }
1126
1127 static JSValueRef Type_callAsFunction_toCYON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { CYTry {
1128     Type_privateData *internal(reinterpret_cast<Type_privateData *>(JSObjectGetPrivate(_this)));
1129     CYPool pool;
1130     const char *type(sig::Unparse(pool, internal->type_));
1131     size_t size(strlen(type));
1132     char *cyon(new(pool) char[12 + size + 1]);
1133     memcpy(cyon, "new Type(\"", 10);
1134     cyon[12 + size] = '\0';
1135     cyon[12 + size - 2] = '"';
1136     cyon[12 + size - 1] = ')';
1137     memcpy(cyon + 10, type, size);
1138     return CYCastJSValue(context, CYJSString(cyon));
1139 } CYCatch }
1140
1141 static JSValueRef Type_callAsFunction_toJSON(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
1142     return Type_callAsFunction_toString(context, object, _this, count, arguments, exception);
1143 }
1144
1145 static JSStaticFunction Pointer_staticFunctions[4] = {
1146     {"toCYON", &Pointer_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1147     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1148     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1149     {NULL, NULL, 0}
1150 };
1151
1152 static JSStaticFunction Struct_staticFunctions[2] = {
1153     {"$cya", &Struct_callAsFunction_$cya, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1154     {NULL, NULL, 0}
1155 };
1156
1157 static JSStaticFunction Functor_staticFunctions[4] = {
1158     {"toCYON", &CYValue_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1159     {"toJSON", &CYValue_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1160     {"valueOf", &CYValue_callAsFunction_valueOf, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1161     {NULL, NULL, 0}
1162 };
1163
1164 namespace cy {
1165     JSStaticFunction const * const Functor::StaticFunctions = Functor_staticFunctions;
1166 }
1167
1168 static JSStaticFunction Type_staticFunctions[4] = {
1169     {"toCYON", &Type_callAsFunction_toCYON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1170     {"toJSON", &Type_callAsFunction_toJSON, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1171     {"toString", &Type_callAsFunction_toString, kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
1172     {NULL, NULL, 0}
1173 };
1174
1175 static JSObjectRef (*JSObjectMakeArray$)(JSContextRef, size_t, const JSValueRef[], JSValueRef *);
1176
1177 void CYSetArgs(int argc, const char *argv[]) {
1178     JSContextRef context(CYGetJSContext());
1179     JSValueRef args[argc];
1180     for (int i(0); i != argc; ++i)
1181         args[i] = CYCastJSValue(context, argv[i]);
1182
1183     JSObjectRef array;
1184     if (JSObjectMakeArray$ != NULL) {
1185         JSValueRef exception(NULL);
1186         array = (*JSObjectMakeArray$)(context, argc, args, &exception);
1187         CYThrow(context, exception);
1188     } else {
1189         JSObjectRef Array(CYGetCachedObject(context, CYJSString("Array")));
1190         JSValueRef value(CYCallAsFunction(context, Array, NULL, argc, args));
1191         array = CYCastJSObject(context, value);
1192     }
1193
1194     JSObjectRef System(CYGetCachedObject(context, CYJSString("System")));
1195     CYSetProperty(context, System, CYJSString("args"), array);
1196 }
1197
1198 JSObjectRef CYGetGlobalObject(JSContextRef context) {
1199     return JSContextGetGlobalObject(context);
1200 }
1201
1202 const char *CYExecute(apr_pool_t *pool, const char *code) {
1203     JSContextRef context(CYGetJSContext());
1204     JSValueRef exception(NULL), result;
1205
1206     void *handle;
1207     if (hooks_ != NULL && hooks_->ExecuteStart != NULL)
1208         handle = (*hooks_->ExecuteStart)(context);
1209     else
1210         handle = NULL;
1211
1212     const char *json;
1213
1214     try {
1215         result = JSEvaluateScript(context, CYJSString(code), NULL, NULL, 0, &exception);
1216     } catch (const char *error) {
1217         return error;
1218     }
1219
1220     if (exception != NULL) { error:
1221         result = exception;
1222         exception = NULL;
1223     }
1224
1225     if (JSValueIsUndefined(context, result))
1226         return NULL;
1227
1228     try {
1229         json = CYPoolCCYON(pool, context, result, &exception);
1230     } catch (const char *error) {
1231         return error;
1232     }
1233
1234     if (exception != NULL)
1235         goto error;
1236
1237     CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
1238
1239     if (hooks_ != NULL && hooks_->ExecuteEnd != NULL)
1240         (*hooks_->ExecuteEnd)(context, handle);
1241     return json;
1242 }
1243
1244 extern "C" void CydgetSetupContext(JSGlobalContextRef context) {
1245     CYSetupContext(context);
1246 }
1247
1248 static bool initialized_ = false;
1249
1250 void CYInitializeDynamic() {
1251     if (!initialized_)
1252         initialized_ = true;
1253     else return;
1254
1255     CYInitializeStatic();
1256
1257     JSObjectMakeArray$ = reinterpret_cast<JSObjectRef (*)(JSContextRef, size_t, const JSValueRef[], JSValueRef *)>(dlsym(RTLD_DEFAULT, "JSObjectMakeArray"));
1258
1259     JSClassDefinition definition;
1260
1261     definition = kJSClassDefinitionEmpty;
1262     definition.className = "All";
1263     definition.getProperty = &All_getProperty;
1264     All_ = JSClassCreate(&definition);
1265
1266     definition = kJSClassDefinitionEmpty;
1267     definition.className = "Context";
1268     definition.finalize = &CYFinalize;
1269     Context_ = JSClassCreate(&definition);
1270
1271     definition = kJSClassDefinitionEmpty;
1272     definition.className = "Functor";
1273     definition.staticFunctions = cy::Functor::StaticFunctions;
1274     definition.callAsFunction = &Functor_callAsFunction;
1275     definition.finalize = &CYFinalize;
1276     Functor_ = JSClassCreate(&definition);
1277
1278     definition = kJSClassDefinitionEmpty;
1279     definition.className = "Pointer";
1280     definition.staticFunctions = Pointer_staticFunctions;
1281     definition.getProperty = &Pointer_getProperty;
1282     definition.setProperty = &Pointer_setProperty;
1283     definition.finalize = &CYFinalize;
1284     Pointer_ = JSClassCreate(&definition);
1285
1286     definition = kJSClassDefinitionEmpty;
1287     definition.className = "Struct";
1288     definition.staticFunctions = Struct_staticFunctions;
1289     definition.getProperty = &Struct_getProperty;
1290     definition.setProperty = &Struct_setProperty;
1291     definition.getPropertyNames = &Struct_getPropertyNames;
1292     definition.finalize = &CYFinalize;
1293     Struct_ = JSClassCreate(&definition);
1294
1295     definition = kJSClassDefinitionEmpty;
1296     definition.className = "Type";
1297     definition.staticFunctions = Type_staticFunctions;
1298     definition.getProperty = &Type_getProperty;
1299     definition.callAsFunction = &Type_callAsFunction;
1300     definition.callAsConstructor = &Type_callAsConstructor;
1301     definition.finalize = &CYFinalize;
1302     Type_privateData::Class_ = JSClassCreate(&definition);
1303
1304     definition = kJSClassDefinitionEmpty;
1305     definition.className = "Global";
1306     //definition.getProperty = &Global_getProperty;
1307     Global_ = JSClassCreate(&definition);
1308
1309     Array_s = JSStringCreateWithUTF8CString("Array");
1310     cy_s = JSStringCreateWithUTF8CString("$cy");
1311     length_s = JSStringCreateWithUTF8CString("length");
1312     message_s = JSStringCreateWithUTF8CString("message");
1313     name_s = JSStringCreateWithUTF8CString("name");
1314     pop_s = JSStringCreateWithUTF8CString("pop");
1315     prototype_s = JSStringCreateWithUTF8CString("prototype");
1316     push_s = JSStringCreateWithUTF8CString("push");
1317     splice_s = JSStringCreateWithUTF8CString("splice");
1318     toCYON_s = JSStringCreateWithUTF8CString("toCYON");
1319     toJSON_s = JSStringCreateWithUTF8CString("toJSON");
1320     toPointer_s = JSStringCreateWithUTF8CString("toPointer");
1321
1322     Result_ = JSStringCreateWithUTF8CString("_");
1323
1324     if (hooks_ != NULL && hooks_->Initialize != NULL)
1325         (*hooks_->Initialize)();
1326 }
1327
1328 void CYThrow(JSContextRef context, JSValueRef value) {
1329     if (value != NULL)
1330         throw CYJSError(context, value);
1331 }
1332
1333 const char *CYJSError::PoolCString(apr_pool_t *pool) const {
1334     // XXX: this used to be CYPoolCString
1335     return CYPoolCCYON(pool, context_, value_);
1336 }
1337
1338 JSValueRef CYJSError::CastJSValue(JSContextRef context) const {
1339     // XXX: what if the context is different?
1340     return value_;
1341 }
1342
1343 JSValueRef CYCastJSError(JSContextRef context, const char *message) {
1344     JSObjectRef Error(CYGetCachedObject(context, CYJSString("Error")));
1345
1346     JSValueRef arguments[1] = {CYCastJSValue(context, message)};
1347
1348     JSValueRef exception(NULL);
1349     JSValueRef value(JSObjectCallAsConstructor(context, Error, 1, arguments, &exception));
1350     CYThrow(context, exception);
1351
1352     return value;
1353 }
1354
1355 JSValueRef CYPoolError::CastJSValue(JSContextRef context) const {
1356     return CYCastJSError(context, message_);
1357 }
1358
1359 CYJSError::CYJSError(JSContextRef context, const char *format, ...) {
1360     _assert(context != NULL);
1361
1362     CYPool pool;
1363
1364     va_list args;
1365     va_start(args, format);
1366     const char *message(apr_pvsprintf(pool, format, args));
1367     va_end(args);
1368
1369     value_ = CYCastJSError(context, message);
1370 }
1371
1372 JSGlobalContextRef CYGetJSContext(JSContextRef context) {
1373     return reinterpret_cast<Context *>(JSObjectGetPrivate(CYCastJSObject(context, CYGetProperty(context, CYGetGlobalObject(context), cy_s))))->context_;
1374 }
1375
1376 extern "C" void CYSetupContext(JSGlobalContextRef context) {
1377     CYInitializeDynamic();
1378
1379     JSObjectRef global(CYGetGlobalObject(context));
1380
1381     JSObjectRef cy(JSObjectMake(context, Context_, new Context(context)));
1382     CYSetProperty(context, global, cy_s, cy, kJSPropertyAttributeDontEnum);
1383
1384 /* Cache Globals {{{ */
1385     JSObjectRef Array(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Array"))));
1386     CYSetProperty(context, cy, CYJSString("Array"), Array);
1387
1388     JSObjectRef Array_prototype(CYCastJSObject(context, CYGetProperty(context, Array, prototype_s)));
1389     CYSetProperty(context, cy, CYJSString("Array_prototype"), Array_prototype);
1390
1391     JSObjectRef Error(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Error"))));
1392     CYSetProperty(context, cy, CYJSString("Error"), Error);
1393
1394     JSObjectRef Function(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Function"))));
1395     CYSetProperty(context, cy, CYJSString("Function"), Function);
1396
1397     JSObjectRef Function_prototype(CYCastJSObject(context, CYGetProperty(context, Function, prototype_s)));
1398     CYSetProperty(context, cy, CYJSString("Function_prototype"), Function_prototype);
1399
1400     JSObjectRef Object(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("Object"))));
1401     CYSetProperty(context, cy, CYJSString("Object"), Object);
1402
1403     JSObjectRef Object_prototype(CYCastJSObject(context, CYGetProperty(context, Object, prototype_s)));
1404     CYSetProperty(context, cy, CYJSString("Object_prototype"), Object_prototype);
1405
1406     JSObjectRef String(CYCastJSObject(context, CYGetProperty(context, global, CYJSString("String"))));
1407     CYSetProperty(context, cy, CYJSString("String"), String);
1408 /* }}} */
1409
1410     CYSetProperty(context, Array_prototype, toCYON_s, &Array_callAsFunction_toCYON, kJSPropertyAttributeDontEnum);
1411
1412     JSObjectRef cycript(JSObjectMake(context, NULL, NULL));
1413     CYSetProperty(context, global, CYJSString("Cycript"), cycript);
1414     CYSetProperty(context, cycript, CYJSString("gc"), &Cycript_gc_callAsFunction);
1415
1416     JSObjectRef Functor(JSObjectMakeConstructor(context, Functor_, &Functor_new));
1417     JSObjectSetPrototype(context, CYCastJSObject(context, CYGetProperty(context, Functor, prototype_s)), Function_prototype);
1418     CYSetProperty(context, cycript, CYJSString("Functor"), Functor);
1419
1420     CYSetProperty(context, cycript, CYJSString("Pointer"), JSObjectMakeConstructor(context, Pointer_, &Pointer_new));
1421     CYSetProperty(context, cycript, CYJSString("Type"), JSObjectMakeConstructor(context, Type_privateData::Class_, &Type_new));
1422
1423     JSObjectRef all(JSObjectMake(context, All_, NULL));
1424     CYSetProperty(context, cycript, CYJSString("all"), all);
1425
1426     if (true) {
1427         JSObjectRef last(NULL), curr(global);
1428
1429         goto next; for (JSValueRef next;;) {
1430             if (JSValueIsNull(context, next))
1431                 break;
1432             last = curr;
1433             curr = CYCastJSObject(context, next);
1434           next:
1435             next = JSObjectGetPrototype(context, curr);
1436         }
1437
1438         JSObjectSetPrototype(context, last, all);
1439     }
1440
1441     CYSetProperty(context, global, CYJSString("$cyq"), &$cyq, kJSPropertyAttributeDontEnum);
1442
1443     JSObjectRef System(JSObjectMake(context, NULL, NULL));
1444     CYSetProperty(context, cy, CYJSString("System"), System);
1445
1446     CYSetProperty(context, global, CYJSString("system"), System);
1447     CYSetProperty(context, System, CYJSString("args"), CYJSNull(context));
1448     //CYSetProperty(context, System, CYJSString("global"), global);
1449     CYSetProperty(context, System, CYJSString("print"), &System_print);
1450
1451     if (hooks_ != NULL && hooks_->SetupContext != NULL)
1452         (*hooks_->SetupContext)(context);
1453 }
1454
1455 JSGlobalContextRef CYGetJSContext() {
1456     CYInitializeDynamic();
1457
1458     static JSGlobalContextRef context_;
1459
1460     if (context_ == NULL) {
1461         context_ = JSGlobalContextCreate(Global_);
1462         CYSetupContext(context_);
1463     }
1464
1465     return context_;
1466 }